WO2023065886A1

WO2023065886A1 - Wake-up method and apparatus, and electronic device

Info

Publication number: WO2023065886A1
Application number: PCT/CN2022/118235
Authority: WO
Inventors: 孙晓宇
Original assignee: 荣耀终端有限公司
Priority date: 2021-10-21
Filing date: 2022-09-09
Publication date: 2023-04-27
Also published as: US20240155499A1; CN114095995B; CN114095995A; EP4333530A1

Abstract

Provided in the embodiments of the present application is a wake-up method. The wake-up method comprises: a first signal processing circuit performing monitoring on a first frequency point; a second signal processing circuit performing monitoring on a second frequency point, wherein the second frequency point is different from the first frequency point; and the second signal processing circuit receiving a wake-up signal on the second frequency point, wherein the bandwidth of the wake-up signal is less than a first value, the wake-up signal is transmitted by a first electronic device on a plurality of transmission frequency points or on a bandwidth greater than a second value, and the second value is greater than the first value. Moreover, the first signal processing circuit performs monitoring on the second frequency point; the second signal processing circuit performs monitoring on a third frequency point, wherein the third frequency point is different from both the first frequency point and the second frequency point; and in this case, the first signal processing circuit receives a wake-up signal on the second frequency point. In this way, wake-up signals are monitored on a plurality of frequency points, such that the probability of successfully capturing a wake-up signal is increased, and the wake-up time delay is reduced.

Description

Wake-up method, device and electronic equipment

This application claims the priority of a Chinese patent application with application number 202111228030.4 and application title "Wake-Up Method, Apparatus, and Electronic Equipment" filed with the China Patent Office on October 21, 2021, the entire contents of which are hereby incorporated by reference in this application .

technical field

The present application relates to the field of terminal equipment, and in particular to a wake-up method, device and electronic equipment.

Background technique

To establish a connection between wireless electronic devices, the sender first needs to transmit a set of specific wake-up signals, and the wake-up device receives the wake-up signal and demodulates it correctly to achieve effective wake-up and start to establish a connection. The traditional receiver architecture in wireless electronic equipment includes high-power devices such as low-noise amplifiers, mixers, and automatic gain controllers. If they are kept on during the waiting for wake-up phase, the standby power consumption of the receiver will be greatly increased. The related technology reduces the standby power consumption of the receiver by reducing the duty cycle of the receiver, that is, the receiver periodically switches between the working state and the sleeping state. Although this solution of reducing the duty cycle can effectively reduce the standby power consumption of the receiver, it also reduces the probability of the receiver being woken up and increases the wake-up delay.

Contents of the invention

In order to solve the above technical problems, the present application provides a wake-up method, device and electronic equipment, which can monitor wake-up signals with extremely narrow bandwidths at multiple frequency points, increase the probability of successfully capturing wake-up signals, and reduce wake-up delays.

In a first aspect, the present application provides a method for waking up. The method includes: the first signal processing circuit monitors at a first frequency point; the second signal processing circuit monitors at a second frequency point; the second frequency point is different from the first frequency point; the second signal processing circuit monitors at a second frequency point; A wake-up signal is received at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points, or the wake-up signal is transmitted by the first electronic device at a frequency greater than the second transmitted over the bandwidth of the value; the second value is greater than the first value. And, when temperature drift occurs, the first signal processing circuit monitors on the second frequency point; the second signal processing circuit monitors on the third frequency point; the third frequency point is connected with the first frequency point and the second frequency point are all different; at this time, the first signal processing circuit receives the wake-up signal at the second frequency point. In this way, on the one hand, by monitoring the wake-up signal at multiple frequency points, the probability of successfully capturing the wake-up signal is increased, thereby increasing the probability of the electronic device being successfully woken up, and reducing the wake-up time delay. On the other hand, by monitoring at multiple frequency points, the wake-up signal can still be successfully captured when temperature drift occurs, effectively overcoming the influence of temperature drift.

Exemplarily, the wake-up method may further include: the third signal processing circuit monitors on a third frequency point. After the temperature drift occurs, the third signal processing circuit monitors at the fourth frequency point. The fourth frequency point is different from the first frequency point, the second frequency point, and the third frequency point. In this application, multiple signal processing circuits can be used to monitor multiple different frequency points. The more signal processing circuits there are, the greater the probability of successfully capturing the wake-up signal and the smaller the wake-up time delay.

According to the first aspect, the first signal processing circuit outputs a first logic value, which is used to indicate that the first signal processing circuit receives a wake-up signal. Moreover, the second signal processing circuit outputs a second logic value, and the second logic value is used to indicate that the second signal processing circuit has not received the wake-up signal. The first logic OR operation circuit determines that the wake-up signal is received according to the first logic value and the second logic value. In this way, when any one of the first signal processing circuit and the second signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received, which improves the receiving sensitivity. When multiple signal processing circuits are used, if each signal processing circuit receives a wake-up signal, it can output a logic value of 1; The logic values of the outputs are added, and if a logic value of 1 is obtained, it is determined that a wake-up signal has been received. In this way, as long as at least one signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received.

According to the first aspect, the first signal processing circuit includes a very narrowband bandpass filter, an envelope detector, a comparator and a correlator, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and the input end of the envelope detector is connected to the The output end of the ultra-narrowband bandpass filter is coupled, the input end of the comparator is coupled with the output end of the envelope detector, and the input end of the correlator is coupled with the output end of the comparator. In this way, when the first signal processing circuit receives the wake-up signal at the second frequency point, it may include: an extremely narrowband bandpass filter performs extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain an extremely narrowband bandpass filter. The filtered signal with wide bandwidth; the envelope detector extracts the amplitude envelope of the filtered signal to obtain the baseband pulse signal; the comparator compares the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence; the correlator obtains the first digital signal The first correlation index value of the sequence and the preset wake-up sequence, and compare the first correlation index value with the preset correlation threshold to obtain the correlation comparison result, when the correlation comparison result indicates the first correlation index Values greater than the correlation threshold, the first signal is a wake-up signal. In this way, filtering on an extremely narrow bandwidth can filter out more noise and interference and improve anti-interference capability.

According to the first aspect, the comparator comprises a first comparator and a second comparator, the input terminals of the first comparator and the input terminals of the second comparator are respectively coupled to the output terminals of the envelope detector; the correlator comprises a first correlator and a second correlator, the input of the first correlator is coupled to the output of the first comparator, and the input of the second correlator is coupled to the output of the second comparator; the first signal processing circuit also includes a second Logic OR operation circuit, the output end of the first correlator and the output end of the second correlator are respectively coupled with the input end of the second logic OR operation circuit. In this way, the comparator compares the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence, including: the first comparator compares the voltage of the baseband pulse signal with the first reference voltage to obtain the first candidate digital signal sequence; the second comparator compares the voltage of the baseband pulse signal with the second reference voltage to obtain a second candidate digital signal sequence; the second reference voltage is different from the first reference voltage. In this way, the correlator obtains the first correlation index value of the first digital signal sequence and the preset wake-up sequence, and compares the first correlation index value with the preset correlation threshold to obtain the correlation comparison result. The result of the comparison indicates that the first correlation index value is greater than the correlation threshold, and the first signal is a wake-up signal, including: the first correlator obtains the first correlation index value of the first candidate digital signal sequence and the preset wake-up sequence The first candidate value, and compare the first candidate value of the first correlation index value with the preset correlation threshold to obtain the first correlation comparison result; the second correlator obtains the second candidate digital signal sequence and the second candidate value of the first correlation index value of the preset wake-up sequence, and comparing the second candidate value of the first correlation index value with the preset correlation threshold value to obtain a second correlation comparison Result; the second logical or operation circuit performs a logical or operation on the first correlation comparison result and the second correlation comparison result to obtain the first logical or operation result; when the first logic or operation result indicates the value of the first correlation index value At least one of the first candidate value and the second candidate value of the first correlation index value is greater than a preset correlation threshold, and the first signal processing circuit receives a wake-up signal at a second frequency point. In this way, in each signal processing circuit, a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.

Exemplarily, the comparators may be a group of comparators, and the number of comparators in the group may be greater than 2. Wherein, the reference voltage of each comparator in the group of comparators is adapted to the preset distance, and the reference voltages of different comparators are different. In this way, when the distance between the two wireless electronic devices is different, both have a comparator with a reference voltage corresponding to the distance, and can accurately obtain the wake-up sequence in the wake-up signal, thereby successfully waking up. It can be seen that using multiple comparators with different reference voltages can significantly improve sensitivity.

According to the first aspect, the first signal processing circuit includes an extremely narrowband bandpass filter, an envelope detector, a comparator including an integrating circuit, and a correlator, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and the envelope detector The input terminal of the correlator is coupled to the output terminal of the extremely narrow band pass filter, the input terminal of the comparator including the integrating circuit is coupled to the output terminal of the envelope detector, the input terminal of the correlator is coupled to the output terminal of the comparator including the integrating circuit coupling. In this way, the first signal processing circuit receives the wake-up signal at the second frequency point, including: an extremely narrow-band band-pass filter performs extremely narrow-band band-pass filtering on the first signal monitored at the second frequency point to obtain an extremely narrow bandwidth The filtered signal; the envelope detector extracts the amplitude envelope of the filtered signal to obtain the baseband pulse signal; the comparator including the integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with the reference voltage , to obtain the second digital signal sequence; the correlator obtains the second correlation index value of the second digital signal sequence and the preset wake-up sequence, and compares the second correlation index value with the preset correlation threshold value to obtain the correlation A correlation comparison result; when the correlation comparison result indicates that the second correlation index value is greater than a preset correlation threshold, the first signal is a wake-up signal. The integration circuit can accumulate the voltage of the baseband pulse signal to form a corresponding single pulse signal, so that the accuracy of the digital signal sequence output by the comparator can be improved, and the overall sensitivity can be improved.

According to the first aspect, the comparator comprising the integrating circuit comprises a third comparator and a fourth comparator, the third comparator and the fourth comparator both comprise an integrating circuit, the input terminal of the third comparator and the input terminal of the fourth comparator The input terminals are respectively coupled with the output terminals of the envelope detector; the correlator includes a third correlator and a fourth correlator, the input terminal of the third correlator is coupled with the output terminal of the third comparator, and the input terminal of the fourth correlator Coupled with the output of the fourth comparator; the first signal processing circuit also includes a second logic or operation circuit, the output of the third correlator and the output of the fourth correlator are respectively connected to the input of the second logic or operation circuit coupling. In this way, the comparator comprising the integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a reference voltage to obtain a second digital signal sequence, including: the third comparator converts the baseband pulse signal It is a single pulse signal, and the voltage of the single pulse signal is compared with the third reference voltage to obtain the third candidate digital signal sequence; the fourth comparator converts the baseband pulse signal into a single pulse signal, and the voltage of the single pulse signal is compared with the first The four reference voltages are compared to obtain a fourth candidate digital signal sequence; the fourth reference voltage is different from the third reference voltage. In this way, the correlator obtains the second correlation index value of the second digital signal sequence and the preset wake-up sequence, and compares the second correlation index value with the preset correlation threshold value to obtain the correlation comparison result; when the correlation The result of the comparison indicates that the second correlation index value is greater than the preset correlation threshold, and the first signal is a wake-up signal, including: the third correlator acquires the second correlation between the third candidate digital signal sequence and the preset wake-up sequence The first alternative value of the index value, and compare the first alternative value of the second correlation index value with the preset correlation threshold to obtain the third correlation comparison result; the fourth correlator obtains the fourth alternative The digital signal sequence is compared with the second candidate value of the second correlation index value of the preset wake-up sequence, and the second candidate value of the second correlation index value is compared with the preset correlation threshold value to obtain the fourth Correlation comparison result; the second logic or operation circuit performs logical OR operation on the third correlation comparison result and the fourth correlation comparison result to obtain the second logic or operation result; when the second logic or operation result indicates the second correlation At least one of the first candidate value of the index value and the second candidate value of the second correlation index value is greater than a preset correlation threshold, and the first signal is a wake-up signal. In this way, in each signal processing circuit, a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.

According to the first aspect, the first frequency point and the second frequency point are adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is small, the probability that the signal processing circuit receives a wake-up signal at an adjacent frequency point is increased, thereby increasing the probability of successful wake-up.

According to the first aspect, the first frequency point and the second frequency point are non-adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is relatively large, the probability that the signal processing circuit receives a wake-up signal at a non-adjacent frequency point is increased, thereby increasing the probability of successful wake-up.

According to the first aspect, the multiple transmitting frequency points include at least one frequency point among the first frequency point and the second frequency point. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.

According to the first aspect, at least one frequency point among the first frequency point and the second frequency point is within a bandwidth within which the first electronic device transmits a wake-up signal. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.

In a second aspect, the present application provides a wake-up device. The wake-up device includes: a first signal processing circuit, the first signal processing circuit is coupled to the antenna, and is used for monitoring at the first frequency point; a second signal processing circuit, the second signal processing circuit is coupled to the antenna, and is used for monitoring at the first frequency point Monitor on the second frequency point; the second frequency point is different from the first frequency point; when no temperature drift occurs, the second signal processing circuit is also used to receive the wake-up signal on the second frequency point; the bandwidth of the wake-up signal is less than A first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points or at a bandwidth greater than a second value; the second value is greater than the first value. When temperature drift occurs, the first signal processing circuit is also used for monitoring on the second frequency point; the second signal processing circuit is also used for monitoring on the third frequency point; the third frequency point and the first frequency point and the second frequency points are all different; the first signal processing circuit is also configured to receive a wake-up signal at the second frequency point. In this way, on the one hand, by monitoring the wake-up signal at multiple frequency points, the probability of successfully capturing the wake-up signal is increased, thereby increasing the probability of the electronic device being successfully woken up, and reducing the wake-up time delay. On the other hand, by monitoring at multiple frequency points, the wake-up signal can still be successfully captured when temperature drift occurs, effectively overcoming the influence of temperature drift.

Exemplarily, the wake-up device may further include: a third signal processing circuit, the third signal processing circuit is coupled to the antenna, and is used for monitoring on a third frequency point. After the temperature drift occurs, the third signal processing circuit is also used for monitoring at the fourth frequency point. The fourth frequency point is different from the first frequency point, the second frequency point, and the third frequency point. In this application, multiple signal processing circuits can be used to monitor multiple different frequency points. The more signal processing circuits there are, the greater the probability of successfully capturing the wake-up signal and the smaller the wake-up time delay.

According to the second aspect, the first signal processing circuit is also used to output a first logic value, and the first logic value is used to indicate that the first signal processing circuit receives a wake-up signal; the second signal processing circuit is also used to output a second logic value Value, the second logic value is used to indicate that the second signal processing circuit has not received the wake-up signal; the device also includes: a first logic or operation circuit, the input end of the first logic or operation circuit is connected with the output end of the first signal processing circuit respectively Coupled with the output end of the second signal processing circuit, the first logical OR operation circuit is used to determine that the wake-up signal is received according to the first logic value and the second logic value. In this way, when any one of the first signal processing circuit and the second signal processing circuit receives the wake-up signal, it can be determined that the wake-up signal is received, which improves the receiving sensitivity.

According to the second aspect, the first signal processing circuit includes: an extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used for extremely narrowband processing of the first signal monitored at the second frequency point. Band-pass filtering to obtain filtered signals with extremely narrow bandwidth; envelope detector, the input end of the envelope detector is coupled with the output end of the extremely narrow-band band-pass filter, which is used to extract the amplitude envelope of the filtered signal to obtain the baseband pulse signal ; The comparator, the input end of the comparator is coupled with the output end of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the reference voltage to obtain the first digital signal sequence; the correlator, the input end of the correlator is compared with The output terminal of the device is coupled to obtain the first correlation index value of the first digital signal sequence and the preset wake-up sequence, and compare the first correlation index value with the preset correlation threshold value to obtain a correlation comparison As a result, when the correlation comparison result indicates that the first correlation index value is greater than the correlation threshold, the first signal is a wake-up signal. In this way, filtering on an extremely narrow bandwidth can filter out more noise and interference and improve anti-interference capability.

According to the second aspect, the comparator includes: a first comparator, the input terminal of the first comparator is coupled to the output terminal of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the first reference voltage to obtain the first Alternative digital signal sequence; a second comparator, the input end of the second comparator is coupled to the output end of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the second reference voltage to obtain the second alternative digital signal sequence Signal sequence; the second reference voltage is different from the first reference voltage. Wherein, the correlator includes: a first correlator, the input terminal of the first correlator is coupled to the output terminal of the first comparator, and is used to obtain the first correlation index between the first candidate digital signal sequence and the preset wake-up sequence value, and compare the first alternative value of the first correlation index value with the preset correlation threshold to obtain the first correlation comparison result; the second correlator, the second correlator The input terminal is coupled to the output terminal of the second comparator, which is used to obtain the second candidate value of the first correlation index value of the second candidate digital signal sequence and the preset wake-up sequence, and compare the first correlation index value The second candidate value of is compared with the preset correlation threshold to obtain a second correlation comparison result. The wake-up device also includes a second logic or operation circuit, the input terminals of the second logic or operation circuit are respectively coupled with the output terminals of the first correlator and the output terminal of the second correlator, and are used to compare the results of the first correlation and the second correlator. Perform logical OR operation on the two correlation comparison results to obtain the first logical OR operation result; when the first logic OR operation result indicates the first alternative value of the first correlation index value and the second alternative value of the first correlation index value At least one of the values is greater than a preset correlation threshold, and the first signal is a wake-up signal. In this way, in each signal processing circuit, a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.

According to the second aspect, the first signal processing circuit includes: an extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used for extremely narrowband processing of the first signal monitored at the second frequency point. Band-pass filtering to obtain a filtered signal with an extremely narrow bandwidth; an envelope detector, the input end of which is coupled to the output end of an extremely narrow-band band-pass filter for detecting the amplitude envelope of the filtered signal to obtain a baseband pulse signal; A comparator including an integrator circuit, the input terminal of the comparator including the integrator circuit is coupled with the output terminal of the envelope detector, and is used to convert the baseband pulse signal into a single pulse signal, and compare the voltage of the single pulse signal with the reference voltage Comparing to obtain a second digital signal sequence; a correlator, the input end of the correlator is coupled to the output end of the comparator comprising an integrator circuit, and is used to obtain the second correlation between the second digital signal sequence and the preset wake-up sequence index value, and compare the second correlation index value with the preset correlation threshold to obtain the correlation comparison result; when the correlation comparison result indicates that the second correlation index value is greater than the preset correlation threshold, the first signal for the wake-up signal. The integration circuit can accumulate the voltage of the baseband pulse signal to form a corresponding single pulse signal, so that the accuracy of the digital signal sequence output by the comparator can be improved, and the overall sensitivity can be improved.

According to the second aspect, the comparator comprising the integrating circuit comprises: a third comparator, the integrating circuit is included in the third comparator, the input terminal of the third comparator is coupled with the output terminal of the envelope detector, and is used to convert the baseband pulse signal Convert to a single pulse signal, and compare the voltage of the single pulse signal with the third reference voltage to obtain a third alternative digital signal sequence; the fourth comparator, which includes an integrating circuit, and the input terminal of the fourth comparator Coupled with the output end of the envelope detector, it is used to convert the baseband pulse signal into a single pulse signal, and the voltage of the single pulse signal is compared with the fourth reference voltage to obtain a fourth candidate digital signal sequence; the fourth reference voltage and The third reference voltages are different. Wherein, the correlator includes: a third correlator, the input terminal of the third correlator is coupled to the output terminal of the third comparator, and is used to obtain the second correlation index between the third candidate digital signal sequence and the preset wake-up sequence The first alternative value of the value, and compare the first alternative value of the second correlation index value with the preset correlation threshold to obtain the third correlation comparison result; the fourth correlator, the fourth correlator's The input terminal is coupled to the output terminal of the fourth comparator, and is used to obtain the second candidate value of the second correlation index value of the fourth candidate digital signal sequence and the preset wake-up sequence, and compare the second correlation index value The second candidate value of is compared with the preset correlation threshold to obtain a fourth correlation comparison result. Moreover, the wake-up device also includes a second logic or operation circuit, the input terminals of the second logic or operation circuit are respectively coupled with the output terminals of the third correlator and the output terminal of the fourth correlator, and are used to compare the results of the third correlation Perform a logical OR operation with the fourth correlation comparison result to obtain a second logical OR operation result; when the second logical OR operation result indicates the first alternative value of the second correlation index value and the second second correlation index value At least one of the candidate values is greater than a preset correlation threshold, and the first signal is a wake-up signal. In this way, in each signal processing circuit, a plurality of comparators with different reference voltages are used to compare with the voltage of the baseband pulse signal, and different reference voltages correspond to different distances, so that when the distances between two wireless electronic devices are different, at least One comparator can output an accurate wake-up sequence, thereby successfully waking up the main transceiver in the electronic device and improving the sensitivity.

According to the second aspect, the first frequency point and the second frequency point are adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is small, the probability that the signal processing circuit receives a wake-up signal at an adjacent frequency point is increased, thereby increasing the probability of successful wake-up.

According to the second aspect, the first frequency point and the second frequency point are non-adjacent frequency points. In this way, when the temperature drift occurs and the temperature drift is relatively large, the probability that the signal processing circuit receives a wake-up signal at a non-adjacent frequency point is increased, thereby increasing the probability of successful wake-up.

According to the second aspect, the multiple transmitting frequency points include at least one frequency point among the first frequency point and the second frequency point. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.

According to the second aspect, at least one frequency point among the first frequency point and the second frequency point is within a bandwidth within which the first electronic device transmits the wake-up signal. In this way, the probability of receiving a wake-up signal can be increased, thereby increasing the probability of successful wake-up.

In a third aspect, the present application provides an electronic device. The electronic device includes a memory and a processor, the memory is coupled to the processor; the memory stores program instructions, and when the program instructions are executed by the processor, the electronic device executes the first aspect or wakes up in any possible implementation manner of the first aspect method.

In a fourth aspect, the present application provides a computer-readable storage medium. The computer-readable storage medium includes a computer program, and when the computer program is run on the electronic device, the electronic device is made to execute the wake-up method in the first aspect or any possible implementation manner of the first aspect.

Description of drawings

FIG. 1 is a schematic diagram of sending timing and receiving timing of a scheme using a low duty cycle shown by way of example;

FIG. 2 is a schematic diagram of an application scenario of an exemplary wake-up method;

Fig. 3 is the flow chart of the wake-up method shown exemplary;

FIG. 4 is a schematic structural diagram of an exemplary transmitter and receiver;

FIG. 5 is a schematic structural diagram of the wake-up receiver 220 in FIG. 4 exemplarily shown;

FIG. 6 is a schematic diagram illustrating the signal transmission relationship between the signal processing circuit 222 and the logical OR operation circuit 223 in FIG. 5;

FIG. 7 is a schematic structural diagram of the signal processing circuit 222 in FIG. 5 exemplarily shown;

FIG. 8 is a schematic diagram of a signal transmission relationship between a comparator and a correlator shown exemplarily;

FIG. 9 is a schematic diagram of the transmitting signal of the transmitter and the receiving signal of the wake-up receiver in the multi-frequency point transmission mode;

Fig. 10 is a schematic diagram showing the comparison of the bandwidth of the transmitter's transmission signal and the wake-up receiver's reception signal in the multi-frequency point transmission mode with the bandwidth of the transmitter's transmission signal and the wake-up receiver's reception signal in the traditional solution;

FIG. 11 is a timing diagram of an exemplary transmitter 100 transmitting a wake-up signal;

FIG. 12 is a schematic diagram of the principles of the multi-frequency point transmission method against temperature drift;

FIG. 13 is an exemplary flow chart of listening to frequency points for transmitting wake-up signals;

FIG. 14 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are non-adjacent frequency points;

FIG. 15 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are adjacent frequency points;

FIG. 16 is a schematic diagram showing a comparison between frequency points for transmitting wake-up signals and operating frequency points for wake-up receivers;

Fig. 17 is a schematic diagram of the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the large-bandwidth transmission mode;

FIG. 18 is a schematic diagram of the principle of combating temperature drift in a large-bandwidth transmission mode;

Fig. 19 is a schematic diagram showing bandwidth comparison between the transmitter's transmission signal and the wake-up receiver's reception signal in the large-bandwidth transmission mode and the traditional solution;

FIG. 20 is a physical frame structure diagram of an exemplary wake-up signal;

FIG. 21 is another physical frame structure diagram of an exemplary wake-up signal;

Fig. 22 is a schematic block diagram of an apparatus 900 according to an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

The term "and/or" in this article is just an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and there exists alone B these three situations.

The terms "first" and "second" in the description and claims of the embodiments of the present application are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first target object, the second target object, etc. are used to distinguish different target objects, rather than describing a specific order of the target objects.

In the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present application shall not be interpreted as being more preferred or more advantageous than other embodiments or design schemes. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more. For example, multiple processing units refer to two or more processing units; multiple systems refer to two or more systems.

The wake-up method in the embodiment of the present application may be applied to a wake-up scene between a first electronic device and one or more second electronic devices. Wherein, the first electronic device may be, for example, a mobile phone, a tablet computer, a smart watch, a Wi-Fi router, a sensor network information collection device, a central node, a drone, a base station (Base Station) and other electronic devices. The second electronic device may be, for example, a mobile phone, a tablet computer, a Wi-Fi router, an electronic tag, a wireless earphone, a smart meter, a smart watch, and other electronic devices.

In the related art, the standby power consumption of the electronic device can be reduced by reducing the duty cycle of the receiver in the electronic device. In the related art, the receiver is periodically switched between the working state and the sleeping state. Among them, the duty cycle is defined as the ratio of the working time to the total time. FIG. 1 is a schematic diagram of a transmission timing and a reception timing of a scheme using a low duty cycle shown by way of example. Referring to FIG. 1 , the transmitter transmits a signal every 20ms (milliseconds), wherein, the transmitter works for 3ms in each cycle (20ms). The receiver starts every 600ms, and the working time is 60ms each time, and the duty cycle=60/600=0.1. The receiver's shortest delay is 3ms, but the longest delay can reach 543ms.

It can be seen that although reducing the duty cycle can effectively reduce the standby power consumption of the receiver, it also reduces the probability of the receiver being woken up and increases the wake-up delay.

Fig. 2 is a schematic diagram of an application scenario of the wake-up method exemplarily shown. Please refer to Figure 2. Before establishing a connection between a mobile phone and an electronic tag, smart watch, wireless headset, WiFi router, or a group of smart meters, the wake-up method of the embodiment of the present application can be used to wake up the electronic tag, smart watch, wireless headset, A Wi-Fi router or a set of smart meters. After waking up, the mobile phone can establish a communication protocol based on a communication protocol such as Wi-Fi protocol, Bluetooth (Blue Tooth, BT) protocol, device-to-device (Device-to-Device , D2D) protocol, cellular mobile communication protocol, etc., for data communication.

It should be noted that the types and quantities of electronic devices in the application scenario shown in FIG. 1 are only illustrative examples, and are not limited in this application.

In the embodiment of the present application, the wake-up method is applied to a wake-up system including a first electronic device and a second electronic device. Wherein, the first electronic device is a wake-up device, and the second electronic device is a wake-up device. The main transceiver in the second electronic device is used for data communication with the first electronic device, but the main transceiver usually has high power consumption. During the standby process of the second electronic device, if the main transceiver is kept on, it will be extremely The standby power consumption of the second electronic device is greatly increased. In order to reduce the standby power consumption of the second electronic device, the embodiment of the present application proposes a new receiver architecture for the second electronic device, and on this basis, proposes the wake-up method of the embodiment of the present application.

The receiver architecture and the principle of the wake-up method corresponding to the wake-up method in the embodiment of the present application will be described below with reference to the accompanying drawings.

Fig. 3 is a flow chart of a wake-up method exemplarily shown. The wake-up method may be executed by the wake-up receiver 220 in FIG. 4 . Please refer to Figure 3. In the embodiment of this application, the wake-up method may include:

Step S301, the first signal processing circuit monitors on the first frequency point;

Step S302, the second signal processing circuit monitors at the second frequency point; the second frequency point is different from the first frequency point;

Step S303, the second signal processing circuit receives the wake-up signal at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points or at a frequency greater than the second value transmitted over the bandwidth; the second value is greater than the first value;

Step S304, the first signal processing circuit monitors the second frequency point;

Step S305, the second signal processing circuit monitors the third frequency point; the third frequency point is different from the first frequency point and the second frequency point;

Step S306, the first signal processing circuit receives a wake-up signal at the second frequency point.

Wherein, the first signal processing circuit and the second signal processing circuit are circuits in the subsequent wake-up receiver in FIG. 4 .

The wake-up method in the embodiment of the present application will be described in further detail below in combination with the receiver and the internal structure of the wake-up receiver.

Fig. 4 is a schematic structural diagram of a transmitter and a receiver shown exemplarily. Referring to FIG. 4 , the first electronic device in the embodiment of the present application includes the transmitter 100 in FIG. 4 , and the second electronic device includes the receiver 200 in FIG. 4 . Wherein, the transmitter 100 may be compatible with transmitters of existing communication systems such as cellular, WiFi, and Bluetooth, and perform data communication with the main transceiver based on traditional protocols.

Please continue to refer to FIG. 4 , the receiver 200 may include a switch 210 , a wake-up receiver 220 , a controller 230 and a main transceiver 240 . The switch 210 is coupled to the receiver antenna, the wake-up receiver 220, the controller 230 and the main transceiver 240, respectively. The wake-up receiver 220 is coupled to the switch 210 and the controller 230, respectively. The controller 230 is coupled to the wake-up receiver 220 and the main transceiver 240, respectively. The main transceiver 240 is coupled to the switch 210 and the controller 230, respectively. In one example, a wake-up receiver 220 may be included in the receiver 200 . In another example, a set of wake-up receivers 220 may be included in the receiver 200 .

The antenna of the receiver 200 (for the convenience of description, hereinafter referred to as the receiving antenna) receives the radio frequency signal transmitted by the antenna of the transmitter 100 (for the convenience of description, hereinafter referred to as the transmitting antenna), the radio frequency signal includes a wake-up signal and a data signal, wherein, The wake-up signal is used to wake up the main transceiver 240 in the receiver 200, that is, to switch the main transceiver 240 from the sleep state to the working state; the data signal is used for data communication between the first electronic device and the second electronic device.

The working principle of the receiver 200 shown in FIG. 4 is: during the standby process of the second electronic device where the receiver 200 is located, the main transceiver 240 is in a dormant state, and the wake-up receiver 220 is in a working state; if the wake-up receiver 220 receives the first When the transmitter 100 of an electronic device sends a wake-up signal, the wake-up receiver 220 sends a signal indicating to wake up the main transceiver 240 to the controller 230, and then the wake-up receiver 220 enters a dormant state. After the controller 230 receives the signal indicating to wake up the main transceiver 240, it can control the main transceiver 240 to switch from the sleep state to the working state.

In another example, after the controller 230 receives the signal indicating to wake up the main transceiver 240, it may also control the main transceiver 240 to remain in the dormant state. Alternatively, after receiving the signal indicating to wake up the main transceiver 240, the controller 230 may also control to switch the main transceiver 240 from the dormant state to the working state after a period of delay.

On the premise of conforming to the working principle, different coupling relationships can be adopted among the components in the receiver 200 shown in FIG. 4 (switch 210, wake-up receiver 220, controller 230, and main transceiver 240). The embodiment of the present application does not limit the coupling relationship between components in the receiver 200 shown in FIG. 4 .

When the receiver 200 adopts different coupling relationships, the working process of the receiver 200 may be different, but the working principle of the receiver 200 is the same as the foregoing working principle.

An exemplary coupling relationship of components in the receiver 200 is used below to provide a working process of the receiver 200 based on the exemplary coupling relationship.

In one example, in FIG. 4, the switch 210 may include two input terminals and two output terminals. One input terminal of the switch 210 (referred to as the first input terminal for convenience of description herein) is coupled to the receiver antenna, and the other input terminal (referred to as the second input terminal for convenience of description herein) of the switch 210 is coupled to the controller 230 . One output terminal of the switch 210 (for convenience of description, referred to as the first output terminal herein) is coupled to the wake-up receiver 220, and the other output terminal (for convenience of description, herein referred to as the second output terminal) is coupled to the main transceiver 240 coupling. Under the action of the control signal of the controller 230, the switch 210 couples the first input end to the first output end, or couples the first input end to the second output end.

In one example, in FIG. 4, the wake-up receiver 220 may include two inputs and one output. The wake-up receiver 220 is connected to the switch 210 and the controller 230 respectively. When the wake-up receiver 220 is in working condition, an input end of the wake-up receiver 220 (for convenience of description, referred to as the first input end of the wake-up receiver 220 herein) is coupled with the switch 210, and the output end of the wake-up receiver 220 is connected with the control device 230 coupling. When the wake-up receiver 220 is in a dormant state, another input terminal of the wake-up receiver 220 (for convenience of description, referred to as the second input terminal of the wake-up receiver 220 herein) is coupled to the controller 230 .

In one example, in FIG. 4, the controller 230 may include two input terminals and three output terminals. One input terminal of the controller 230 (for convenience of description, referred to herein as the first input terminal of the controller 230) is coupled to the wake-up receiver 220, and the other input terminal (for convenience of description, referred to herein as the first input terminal of the controller 230) is coupled to the wake-up receiver 220. Two input terminals) are coupled with the main transceiver 240. An output terminal of the controller 230 (for convenience of description, referred to herein as the first output terminal of the controller 230) is coupled to the switch 210, and an output terminal (for convenience of description, referred to herein as the second output terminal of the controller 230) is coupled to the switch 210. ) is coupled with the main transceiver 240 , and the other output terminal (for convenience of description, referred to as the third output terminal of the controller 230 herein) is coupled with the wake-up receiver 220 .

In one example, in FIG. 4, the main transceiver 240 may include two inputs and two outputs. One input terminal of the main transceiver 240 (for convenience of description, referred to herein as the first input terminal of the main transceiver 240) is coupled to the switch 210, and the other input terminal (for convenience of description, referred to herein as the first input terminal of the main transceiver 240) is coupled to the switch 210. The second input terminal) is coupled with the controller 230. One output terminal of the main transceiver 240 (for convenience of description, referred to herein as the first output terminal of the main transceiver 240) is coupled with the switch 210, and the other output terminal (for convenience of description, referred to herein as the first output terminal of the main transceiver 240) is coupled to the switch 210. The second output terminal) is coupled with the controller 230.

When the receiver 200 adopts the above coupling relationship, the working process of the receiver 200 can be as follows:

When the second electronic device is in the standby state, the first input end of the switch 210 is coupled to the first output end of the switch 210 , and the first input end of the switch 210 and the second output end of the switch 210 remain disconnected. At this time, the wake-up receiver 220 is in the working state, and the main transceiver 240 is in the sleep state.

In the standby state, when a preset wake-up trigger condition is satisfied, the transmitter 100 transmits a wake-up signal through the transmitting antenna. After the wake-up receiver 220 receives the wake-up signal transmitted by the transmitter 100 through the first input terminal of the wake-up receiver 220, it generates a signal indicating to wake up the main transceiver 240, and sends the signal indicating to wake up the main transceiver 240 to the controller 230 . And, wake up the receiver 220 to switch from the working state to the sleeping state.

The controller 230 receives the signal indicating to wake up the main transceiver 240 sent by the wake-up receiver 220 through the first input terminal of the controller 230, generates the first control information indicating that the switch 210 points to the main transceiver 240, and generates a signal indicating that the main transceiver 240 switches to the second control information of the working state, sends the first control information to the switch 210 through the first output end of the controller 230, and sends the second control information to the main transceiver 240 through the second output end of the controller 230 .

The switch 210 receives the first control information sent by the controller 230 through the second input end of the switch 210, and switches the first input end of the switch 210 to couple with the second output end of the switch 210 according to the first control information. At this time, the switch 210 Switch between the first input end of the switch 210 and the first output end of the switch 210 to the state of disconnecting the coupling, the first input end of the main transceiver 240 passes through the second output end of the switch 210, the first input end of the switch 210 and the first input end of the switch 210. Receiver antenna coupling.

After the main transceiver 240 receives the second control information through the second input terminal of the main transceiver 240, it switches from the dormant state to the working state. So far, a wake-up process is completed.

After the main transceiver 240 switches from the dormant state to the working state, it can send a wake-up success notification to the transmitter 100 through the first output terminal. The transmitter 100 may stop sending the wake-up signal after receiving the wake-up success notification.

Thereafter, the transmitter 100 establishes a communication connection with the main transceiver 240 in the receiver 200 based on a communication protocol, such as a Bluetooth protocol, a WiFi protocol, a D2D protocol, and the like. After the communication connection is successfully established, the transmitter 100 transmits the data signal to the receiver 200 through the transmitting antenna, and the main transceiver 240 in the receiver 200 receives the data signal and performs corresponding processing to perform data communication with the transmitter 100 .

When the main transceiver 240 does not receive the data signal for a period of time reaching the preset time threshold, the main transceiver 240 can send a sleep notification message to the controller 230 through the second output terminal, and then switch from the working state to the sleeping state. The second electronic device where the main transceiver 240 is located enters a standby state.

The controller 230 receives the dormancy notification information sent by the main transceiver 240 through the second input terminal of the controller 230, generates the third control information indicating that the switch 210 is directed to wake up the receiver 220, and generates an instruction to wake up the receiver 220 to switch to the working state Send the third control information to the switch 210 through the first output terminal of the controller 230 , and send the fourth control information to the wake-up receiver 220 through the third output terminal of the controller 230 .

The wake-up receiver 220 receives the fourth control information through the second input terminal of the wake-up receiver 220, and switches from the dormant state to the working state according to the instruction of the fourth control information. The receiving antenna performs listening and scanning until the wake-up signal transmitted by the transmitter 100 is received again, and the next wake-up is performed.

It should be noted that the above working process of the receiver 200 is only an example for illustrating the working principle of the receiver 200 , and is not intended to limit the working process of the receiver 200 . Those skilled in the art can understand that, in combination with actual application scenarios, in other embodiments of the present application, the receiver 200 can adopt other coupling relationships different from the coupling relationships in the above examples, and the receiver 200 can adopt different coupling relationships based on the other coupling relationships. Examples of working processes for other working processes.

For example, on the basis of the coupling relationship of the above example, the second output terminal of the controller 230 can be removed. On the basis of the new coupling relationship, when the controller 230 receives the signal sent by the wake-up receiver 220 The signal indicating to wake up the main transceiver 240 generates the first control information indicating that the first input end of the switch 210 is switched to be coupled with the second output end of the switch 210, without generating the second control information indicating that the main transceiver 240 is switched to the working state. The control information is to send the first control information to the switch 210 through the first output terminal of the controller 230 .

The switch 210 receives the first control information sent by the controller 230 through the second input end of the switch 210, and switches the first input end of the switch 210 to couple with the second output end of the switch 210 according to the first control information. At this time, the switch 210 Switch between the first input end of the switch 210 and the first output end of the switch 210 to the state of disconnecting the coupling, the first input end of the main transceiver 240 passes through the second output end of the switch 210, the first input end of the switch 210 and the first input end of the switch 210. Receive antenna coupling.

The main transceiver 240 switches from the sleep state to the working state in response to detecting that the first input terminal of the main transceiver 240 is coupled to the receiving antenna through the second output terminal of the switch 210 and the first input terminal of the switch 210 .

In the embodiment of the present application, the wake-up triggering condition may be set according to actual application requirements. In an example, the wake-up trigger condition may be: the first electronic device where the transmitter 100 is located receives communication data that needs to be forwarded to the second electronic device where the receiver 200 is located. The communication data may be, for example, voice information, video information, etc. . In another example, the wake-up trigger condition may be: the first electronic device where the transmitter 100 is located generates an instruction to start wake-up in response to a user's trigger operation. It should be noted that the two wake-up trigger conditions are only illustrative examples, and the embodiment of the present application does not limit the wake-up trigger conditions.

In the embodiment of the present application, the main transceiver 240 can be a module shared by various communication protocols such as cellular, Wifi, Bluetooth, etc.

In the architecture of the receiver 200 shown in FIG. 4 , a microcontroller unit (Microcontroller Unit, MCU) may be used as the controller 230.

It should be noted that, in an example, an electronic device may only be used as the above-mentioned first electronic device. For example, in a wake-up system including a base station and a mobile phone, the base station is the first electronic device, and the base station includes the The transmitter 100 shown in FIG. 4 does not include the receiver 200 shown in FIG. 4 .

In another example, an electronic device can also be used only as the above-mentioned second electronic device. For example, in a wake-up system including a mobile phone and an electronic tag, the electronic tag is the second electronic device, and the electronic tag includes the The receiver 200 shown in Fig. 4 does not include the transmitter 100 shown in Fig. 4 .

In yet another example, an electronic device can be used both as the above-mentioned first electronic device and as the above-mentioned second electronic device. At this time, the electronic device corresponds to two wake-up systems, such as a mobile phone. In the wake-up system of the electronic tag, the mobile phone is the first electronic device, and in the wake-up system including the base station and the mobile phone, the mobile phone is the second electronic device. At this time, the mobile phone includes the receiver 200 corresponding to the transmitter 100 in the base station , also includes the transmitter 100 corresponding to the receiver 200 in the electronic tag.

It should be noted that the embodiment of the present application does not limit the communication distance between the first electronic device and the second electronic device in the wake-up process in the wake-up system.

Next, the structure of the wake-up receiver 220 will be described in detail with reference to the accompanying drawings.

FIG. 5 is a schematic structural diagram of the wake-up receiver 220 in FIG. 4 exemplarily shown. Referring to FIG. 5 , the wake-up receiver 220 may include a radio frequency signal matching network 221 , multiple parallel signal processing circuits 222 , a logical OR operation circuit 223 , and a wake-up signal generator 224 . The input end of the radio frequency signal matching network 221 is coupled to the receiver antenna, the output end of the radio frequency signal matching network 221 is respectively coupled to the input end of each signal processing circuit, and the input end of each signal processing circuit is connected to the logical OR operation circuit 223. The input terminal is coupled, and the output terminal of the logical OR operation circuit 223 is coupled to the wake-up signal generator 224 .

Wherein, the radio frequency signal matching network 221 is used to implement impedance matching between the wake-up receiver 220 and the receiver antenna. The signal processing circuit 222 is used to process the input signal (herein, the input signal is the signal transmitted by the transmitter 100 in the first electronic device received by the receiving antenna), and determine whether there is a correlation between the input signal and the locally stored wake-up sequence If there is a signal whose correlation is greater than a preset correlation threshold, it is determined that a wake-up signal is received. When the correlation between the wake-up sequence included in the input signal and the locally stored wake-up sequence is greater than a preset correlation threshold, the signal processing circuit 222 outputs a signal (such as a digital signal 1 or a high level signal) indicating that the wake-up signal is received, otherwise A signal (eg, a digital 0 or a low signal) indicating that no wake-up signal has been received is output. The logical OR operation circuit 223 is used for performing a logical OR operation on the high and low level signals or digital signals output by the multiple parallel signal processing circuits 222 . If the logic OR operation result of the logic OR operation circuit 223 is 1, then the signal (such as digital signal 1 or high level signal) that outputs indication to receive the wake-up signal is given to the wake-up signal generator 224, if the logic OR operation result is 0, then Output a signal (such as a digital signal 0 or a low level signal) indicating that no wake-up signal is received to the wake-up signal generator 224 . When the wake-up signal generator 224 receives a signal indicating that the wake-up signal is received from the logical OR operation circuit 223 , it generates a signal indicating to wake up the main transceiver 240 and sends the signal to the controller 230 . So that after the controller 230 receives the signal indicating to wake up the main transceiver 240, it will generate the first control information indicating that the switch 210 points to the main transceiver 240, and generate the second control information indicating that the main transceiver 240 is switched to the working state. The first control information is sent to the switch 210 through the first output terminal of the controller 230 , and the second control information is sent to the main transceiver 240 through the second output terminal of the controller 230 . When the wake-up signal generator 224 receives a signal from the logical OR operation circuit 223 indicating that no wake-up signal has been received, the wake-up signal generator 224 maintains the original state.

Wherein, the working frequency points of the multiple signal processing circuits 222 are different, and each signal processing circuit 222 receives the wake-up signal at its own working frequency point.

FIG. 6 is a schematic diagram illustrating the signal transmission relationship between the signal processing circuit 222 and the logical OR operation circuit 223 in FIG. 5 . In the embodiment of the present application, it is assumed that the signal indicating that a wake-up signal is received is a digital signal 1, and the signal indicating that a wake-up signal is not received is a digital signal 0. Please refer to FIG. 6 , assuming that there are n signal processing circuits in total, which are signal processing circuit 1, signal processing circuit 2...and signal processing circuit n. Each signal processing circuit processes the input signal separately, wherein, after the signal processing circuit 1 processes the input signal, it outputs 1, after the signal processing circuit 2 processes the input signal, it outputs 0, ... the signal processing circuit n pairs the input After the signal is processed, 1 is output. The logical OR operation circuit performs logical OR operation on the digital signals output by the n-channel signal processing circuits, and outputs the operation result 1. In this way, as long as at least one signal processing circuit outputs 1 after processing the input signal, the operation result output by the logic or operation circuit is all 1, and the digital signal 1 is used to subsequently trigger the controller 230 to wake up the main transceiver 240 . When all signal processing circuits in the wake-up receiver 220 output 0, the operation result output by the logical OR operation circuit is 0, and the digital signal 0 will not trigger the wake-up of the main transceiver 240 .

It can be seen that the embodiment of the present application uses multiple parallel signal processing circuits to increase the probability that the wake-up receiver 220 successfully captures the wake-up signal and the probability that the transceiver 240 is woken up, thereby reducing the wake-up delay.

It should be noted that, in other embodiments of the present application, the wake-up receiver 220 may also include only one signal processing circuit 222 . At this time, the logic OR operation circuit 223 is not included in the wake-up receiver 220 , and the signal output by the signal processing circuit 222 is directly transmitted to the wake-up signal generator 224 . In this way, the structure of the wake-up receiver 220 can be simplified, hardware cost can be saved, and power consumption can be reduced.

FIG. 7 is a schematic structural diagram of the signal processing circuit 222 in FIG. 5 exemplarily shown. Referring to FIG. 7 , the signal processing circuit 222 may include an extremely narrow bandpass filter 222a, an envelope detector 222b, multiple parallel comparators 222c and correlators 222d, and a logical OR operation circuit 222e. The input end of the extremely narrowband bandpass filter 222a is coupled to the output end of the radio frequency signal matching network 221, the output end of the extremely narrowband bandpass filter 222a is coupled to the input end of the envelope detector 222b, and the output end of the envelope detector 222b Respectively coupled to the input of each comparator 222c, the output of the comparator 222c is coupled to the input of the correlator 222d, the output of the correlator 222d is coupled to the input of the logic or operation circuit 222e, the logic or operation circuit 222e The output terminal of is coupled with the input terminal of the logical OR operation circuit 223 shown in FIG. 5 .

Wherein, the very narrow band pass filter 222a is used to filter the input signal to obtain a filtered signal with a very narrow bandwidth. The extremely narrow bandpass filter 222a has a very high carrier frequency-to-bandwidth ratio, can effectively filter out-of-band noise and interference, and significantly improve the anti-interference ability of the wake-up receiver 220 .

The envelope detector 222b is used to extract the amplitude envelope of the filtered signal output by the ultra-narrowband bandpass filter 222a to obtain a baseband pulse signal.

In a parallel circuit, the comparator 222c and correlator 222d in each path are connected in series. The comparator 222c is used to compare the voltage of the baseband pulse signal output by the envelope detector 222b with the reference voltage, and output a 0/1 level sequence. Wherein, when the voltage of the baseband pulse signal is greater than or equal to the reference voltage, the comparator 222c outputs 1; when the voltage of the baseband pulse signal is less than or equal to the reference voltage, the comparator 222c outputs 0.

In one example, the comparator 222c may include an integrator circuit for converting the input baseband pulse signal into a single pulse signal, and then comparing the voltage of the single pulse signal with a reference voltage.

In the embodiment of the present application, the reference voltage values used by different comparators 222c are different, and the different reference voltage values are adapted to the different distances between the first electronic device and the second electronic device, so that the first electronic device and the second electronic device When the devices are at different distances, at least one comparator 222c can output an accurate 0/1 level sequence, thereby improving the sensitivity of waking up the receiver.

When the transmission power of the transmitter 100 is constant, the greater the distance between the first electronic device and the second electronic device, the weaker the above-mentioned input signal received by the wake-up receiver 220, and correspondingly, the voltage of the baseband pulse signal or the baseband pulse signal The smaller the converted single pulse signal is, the smaller the required reference voltage is at this time. Conversely, the smaller the distance between the first electronic device and the second electronic device, the stronger the above-mentioned input signal received by the wake-up receiver 220, and correspondingly, the higher the voltage of the baseband pulse signal or the single pulse signal converted from the baseband pulse signal is. At this time, the required reference voltage is also larger.

Table 1 is a correspondence table between the distance d between the first electronic device and the second electronic device and the reference voltage value V.

Table 1

In Table 1, d1<d2<d3, correspondingly, V1>V2>V3. When the distance d≤d1 between the first electronic device and the second electronic device, the comparator using the reference voltage value V=V1 can obtain a 0/1 level sequence; when the distance between the first electronic device and the second electronic device When the distance d1≤d≤d2, use the comparator of the reference voltage value V=V2 to obtain a 0/1 level sequence; when the distance between the first electronic device and the second electronic device is d2≤d≤d3, use A comparator with a reference voltage value V=V3 can obtain a 0/1 level sequence...and so on.

The correlator 222d is used to obtain the correlation index value of the 0/1 level sequence output by the comparator 222c and the wake-up sequence stored locally in the current device (that is, the preset wake-up sequence), if the correlation index value of the two sequences greater than the preset correlation threshold, the correlator 222d outputs a signal indicating that a wake-up signal has been received (such as a digital signal 1 or a high level signal), otherwise it outputs a signal indicating that a wake-up signal has not been received (such as a digital signal 0 or a low level signal) Signal).

The logical OR operation circuit 222e is used for performing logical OR operation on the high and low level signals or digital signals output by the multiple parallel comparators 222c and correlators 222d. Assume that the signal indicating that the wake-up signal has been received is a digital signal 1, and the signal indicating that the wake-up signal has not been received is a digital signal 0. The logical OR operation circuit 222 e outputs the logical OR operation result to the logical OR operation circuit 223 .

FIG. 8 is a schematic diagram illustrating the signal transmission relationship between the comparator and the correlator. Please refer to FIG. 8 , assuming that each signal processing circuit includes k comparators and correlators, which are respectively comparator 1 and correlator 1, comparator 2 and correlator 2 . . . comparator k and correlator k. The same baseband pulse signal is input to each comparator and correlator respectively, comparator 1 and correlator 1 output digital signal 0 after processing the baseband pulse signal, comparator 2 and correlator 2 output digital signal after processing the baseband pulse signal 0, ... the comparator k and the correlator k output the digital signal 0 after processing the baseband pulse signal, that is, the output of all correlators is a digital signal 0, and the logic or operation circuit 222e outputs a digital signal 0, and the logic or operation circuit 222e The output is the output of the corresponding signal processing circuit. If at least one of the k comparators and correlators outputs a digital signal 1, the output of the corresponding signal processing circuit is a digital signal 1, so that the main transceiver 240 can be woken up.

It can be seen that the embodiment of the present application improves the sensitivity of the wake-up receiver 220 by connecting multiple parallel comparators with different reference voltages and corresponding correlators, which helps to reduce the wake-up delay.

It should be noted that, in other embodiments of the present application, each signal processing circuit 222 may only include one comparator 222c and a correlator 222d. At this moment, the logic or operation circuit 222e is not included in the signal processing circuit 222, and the correlator 222d directly outputs the digital signal to the logic or operation circuit 223 (there are multiple signal processing circuits 222 in the wake-up receiver 220 at this time) or output to the wake-up signal processing circuit 222. The signal generator 224 (there is only one signal processing circuit 222 in the wake-up receiver 220 at this time). In this way, the structure of the signal processing circuit 222 can be simplified, hardware cost can be saved, and power consumption can be reduced.

Next, the mechanism of transmitting and receiving the wake-up signal in the embodiment shown in FIG. 4 will be further described in conjunction with the descriptions of the circuit structures in FIG. 4 , FIG. 5 , and FIG. 7 .

In the embodiment of the present application, the bandwidth of the extremely narrowband bandpass filter 222a is very small. Exemplarily, the bandwidth of the extremely narrowband bandpass filter 222a may be less than 1 MHz. The anti-jamming ability of the wake-up receiver 220 can be significantly improved by using an extremely narrow band-pass filter 222a with a very small bandwidth. However, the very narrow bandpass filter 222a suffers from temperature drift. For example, the temperature drift of the ultra-narrowband bandpass filter 222a is the temperature drift of the signal processing circuit 222 where the ultranarrowband bandpass filter 222a is located. Assume that the designed operating frequency of the ultra-narrowband bandpass filter 222a is f, and when the ultranarrowband bandpass filter 222a actually works, the actual operating frequency is f', and f' and f are different frequency points.

Aiming at the problem of temperature drift, the embodiment of the present application proposes a corresponding way of transmitting a wake-up signal.

Exemplarily, the transmitter 100 shown in FIG. 4 may transmit a wake-up signal in the following manner.

The first method of transmitting a wake-up signal is a multi-frequency point transmission method. In this manner, the transmitter 100 transmits wake-up signals with narrow bandwidths at multiple frequency points. Wherein, the bandwidth of the wake-up signal can be set according to application requirements, for example, less than 1 MHz.

FIG. 9 is a schematic diagram of a transmission signal of a transmitter and a reception signal of a wake-up receiver in a multi-frequency point transmission manner. Here, the received signal for waking up the receiver refers to the filtered signal obtained after being filtered by the ultra-narrowband bandpass filter 222a. Referring to FIG. 9 , in the embodiment of the present application, the transmitter 100 may transmit narrow-bandwidth wake-up signals at four frequency points of frequency point 1, frequency point 2, frequency point 3, and frequency point 4, respectively. The wake-up receiver 220 performs extremely narrow-band filtering on the aforementioned input signals received by the receiving antenna through the extremely narrow-band band-pass filters 222a in multiple parallel signal processing circuits of different operating frequencies, as long as any extremely narrow-band band-pass filter 222a filters the filtered signal at any one of frequency point 1, frequency point 2, frequency point 3, and frequency point 4 as a wake-up signal, and the main transceiver 240 can be successfully woken up.

For example, assuming that the wake-up receiver 220 includes 2 parallel signal processing circuits, the operating frequency of the first signal processing circuit is frequency 2, and the operating frequency of the second signal processing circuit is frequency 3. The transmitting frequency points of the machine 100 are frequency point 1, frequency point 2, frequency point 3, and frequency point 4 respectively. If the operating frequency of the signal processing circuit of this channel has temperature drift, the actual operating frequency of the first signal processing circuit after the temperature drift is frequency 5, and the actual operating frequency of the second signal processing circuit after the temperature drift is frequency 5. The point is frequency point 1, then the second signal processing circuit can successfully receive the wake-up signal at frequency point 1 after temperature drift. If the transmitter 100 only transmits the wake-up signal through a single frequency point, for example, only transmits the wake-up signal at frequency 4, the above two signal processing circuits cannot receive the wake-up signal after temperature drift.

It can be seen that the multi-frequency point transmission method increases the matching probability between the actual working frequency point after the temperature drift of the signal processing circuit and the frequency point for transmitting the wake-up signal by increasing the number of transmitting frequency points, and can effectively counteract the impact caused by temperature drift. Influence.

Please continue to refer to FIG. 9 , in the embodiment of the present application, the bandwidth of the transmitted wake-up signal is equal to the bandwidth of the ultra-narrowband bandpass filter 222a in the wake-up receiver 220 (for convenience of description, referred to herein as the receiving bandwidth). For example, the bandwidth of the transmitted wake-up signal and the bandwidth of the very narrow bandpass filter 222a in the wake-up receiver 220 may be 100 KHz.

It should be noted that the number of frequency points for transmitting wake-up signals shown in FIG. 9 is only a schematic illustration. In other embodiments of the present application, more or fewer frequency points for transmitting wake-up signals can be set according to actual application requirements. point, the embodiment of the present application does not limit the number of frequency points for transmitting the wake-up signal. Moreover, the bandwidth of the wake-up signal transmitted and the bandwidth of the extremely narrow band-pass filter 222a in the wake-up receiver 220 listed above are also schematic illustrations. In practical applications, the narrow bandwidth can be determined according to requirements (in the multi-frequency point transmission mode) The bandwidth of the transmitted wake-up signal, the bandwidth of the extremely narrow band-pass filter 222a in the wake-up receiver 220) upper limit value and the actual bandwidth value.

Fig. 10 is a schematic diagram showing the bandwidth comparison between the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the multi-frequency transmission method and the bandwidth of the transmitting signal of the transmitter and the receiving signal of waking up the receiver in the traditional solution. Here, the received signal for waking up the receiver in the multi-frequency point transmission mode refers to the filtered signal obtained after being filtered by the ultra-narrowband bandpass filter 222a. Please refer to Figure 10. In the multi-frequency point transmission mode, both the transmitting signal of the transmitter and the receiving signal of the wake-up receiver are extremely narrow-band signals, while in the traditional solution, the transmitting signal of the transmitter and the receiving signal of the receiver are both broadband signals. Compared with the traditional solution, the signal received by the wake-up receiver in the embodiment of the present application is a narrow-bandwidth signal, which can filter out more noise and interference, thus improving the anti-interference capability. Moreover, in the embodiment of the present application, the transmission power of the transmitter 100 is concentrated in the narrow bandwidth of the wake-up signal, which has a higher power density than the broadband transmission signal in the related scheme, so the wake-up receiver of the embodiment of the present application The signal-to-interference ratio is higher.

Fig. 12 is a schematic diagram schematically illustrating the principle of combating temperature drift in a multi-frequency point transmission manner. Please refer to Figure 12, assuming that the operating frequency of the wake-up receiver is set as frequency 3 during design, but in actual operation, the operating frequency of the wake-up receiver is changed to frequency 4 due to the influence of temperature drift. In this way, even if the temperature drift occurs, since the transmitter transmits the wake-up signal at both frequency point 3 and frequency point 4, the wake-up receiver can still receive the wake-up signal at the actual working frequency point (frequency point 4) after the temperature drift occurs , so that the main receiver can be successfully woken up in the presence of temperature drift.

In the multi-frequency point transmission mode, in an example, the transmitter 100 can transmit the wake-up signal of each frequency point according to the preset transmission cycle, and in each transmission cycle, time-division transmits at each frequency point according to the preset transmission sequence. wake up signal. FIG. 11 is a timing diagram of exemplary transmission of a wake-up signal by the transmitter 100 . Please refer to FIG. 11 , assuming that the frequency points where the transmitter 100 transmits the wake-up signal include frequency point 1, frequency point 2 ... frequency point n, which are n frequency points, at time t1, the transmitter 100 transmits the wake-up signal at frequency point 1, and at time t1 At time t2, transmitter 100 transmits a wake-up signal at frequency point 1, ... at time tn, transmitter 100 transmits a wake-up signal at frequency point n, at time tn+1, transmitter 100 transmits a wake-up signal at frequency point 1, at time At tn+2, the transmitter 100 transmits a wake-up signal at frequency point 1, ... At time t2n, the transmitter 100 transmits a wake-up signal at frequency point n. Among them, t2n=2tn.

In another example of the multi-frequency point transmission method, the transmitter 100 can transmit the wake-up signal of each frequency point according to the preset transmission cycle, and in each transmission cycle, each frequency point is monitored respectively, and the frequency point satisfies the In the preset idle condition, a wake-up signal is sent at this frequency point. When multiple frequency points meet the preset idle condition at the same time, a wake-up signal can be transmitted at the frequency point with the highest priority according to the preset frequency point priority.

In the embodiment of the present application, a carrier sense multiple access/collision avoidance (Carrier Sense Multiple Access with Collision Avoidance, CSMA/CA) technology may be used for interception. Of course, the CSMA/CA technology is only an example of the interception technology in the embodiment of the present application, and the embodiment of the present application does not limit the interception technology.

In an example, the idle condition may be, for example: the continuous idle duration of the frequency point reaches a preset time threshold. The time threshold can be determined according to application requirements.

In the multi-frequency transmission mode, all transmission frequency points can adopt the same interception process. The following uses an example to illustrate the listening process of each frequency point.

Fig. 13 is a flow chart of listening to frequency points for transmitting wake-up signals exemplarily shown. Referring to Figure 13, for each frequency point that emits a wake-up signal, the listening process may include the following steps:

Step S801, when there is a wake-up signal physical frame to be sent at the frequency point, start listening.

In each transmission cycle, each frequency point that transmits the wake-up signal has a physical frame of the wake-up signal that needs to be sent. Assuming that the transmission period is T, if within the transmission period T, the physical frame of the wake-up signal corresponding to a certain frequency point fj has not been sent, then determine the physical frame of the wake-up signal to be sent at the frequency point fj; if within the transmission period T, the frequency point If the physical frame of the wake-up signal corresponding to fj has been sent, it is determined that there is no physical frame of the wake-up signal to be sent at the frequency point fj.

Step S802, determine whether the continuous idle time of the frequency point reaches the preset time threshold, if the continuous idle time of the frequency point reaches the preset time threshold, execute step S803, otherwise, if the continuous idle time of the frequency point has not reached the preset time threshold A time threshold is set, and step S802 is executed.

In one example, at the beginning of each transmission period T, a timer can be started for each frequency point that transmits a wake-up signal, and the idle time of the frequency point is accumulated. If the frequency point is occupied during the accumulation process, the The accumulated time of the timer is cleared and accumulated again. In this way, by querying the current cumulative time of the timer corresponding to the frequency point, and comparing the current cumulative time with the preset time threshold, it can be determined whether the continuous idle time of the frequency point reaches the preset time threshold.

Step S803, determine whether there are other idle frequency points at present, if there are other idle frequency points, execute step S804, otherwise, if there are no other idle frequency points, execute step S805.

Step S804, if there are other idle frequency points at present, determine whether the priority of this frequency point is higher than the priority of all other idle frequency points, if the priority of this frequency point is higher than the priority of all other idle frequency points, perform step S804 S805, otherwise, if at least one idle frequency point among other idle frequency points has a higher priority than the frequency point, return to step S802.

In the multi-frequency point transmission mode, the priority of each frequency point can be set in advance.

Step S805, sending a wake-up signal physical frame at the frequency point, and ending the listening process of the frequency point in the transmission period.

In the embodiment of the present application, by listening to the frequency point for transmitting the wake-up signal before transmitting the wake-up signal, the frequency point can be selected to transmit the wake-up signal at the frequency point when the frequency point is idle, which can reduce the probability of the wake-up signal being interfered and improve the signal quality. Thereby improving the wake-up success rate and reducing the wake-up delay.

In an example, the multiple frequency points at which the transmitter 100 transmits the wake-up signal may not be adjacent. For example, FIG. 14 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are non-adjacent frequency points. Please refer to FIG. 14. In the embodiment of the present application, there are 5 frequency points for transmitter 100 to transmit wake-up signals , the five frequency points are 2450.05MHz, 2450.25MHz...2450.85MHz, the interval between each two frequency points is 200K Hz, and the bandwidth of the wake-up signal is 100K Hz.

In another example, multiple frequency points at which the transmitter 100 transmits the wake-up signal may also be adjacent. For example, FIG. 15 is a schematic diagram illustrating that multiple frequency points for transmitting wake-up signals are adjacent frequency points. Please refer to FIG. 15. In the embodiment of the present application, there are 9 frequency points for transmitter 100 to transmit wake-up signals. The nine frequency points are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85MHz, the interval between each two frequency points is 100K Hz, and the bandwidth of the wake-up signal is 100K Hz.

In one example, in the multi-frequency point transmission mode, the number of frequency points for transmitting the wake-up signal by the transmitter 100 may be greater than the number of operating frequency points for waking up the receiver 220, and the frequency point for transmitting the wake-up signal by the transmitter 100 is the same as the number of frequency points for waking up the receiver. The operating frequencies of the 220 overlap at least partially.

Exemplarily, in the multi-frequency point transmission manner, the frequency points at which the transmitter 100 transmits the wake-up signal may cover all working frequency points for waking up the receiver 220 . For example, FIG. 16 is a schematic diagram showing a comparison between the frequencies for transmitting wake-up signals and the operating frequencies for wake-up receivers. Please refer to FIG. 16. The frequencies for transmitting wake-up signals are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85 MHz (a total of 9 frequency points), the operating frequency points of the wake-up receiver 220 are 2450.05MHz, 2450.25MHz...2450.85MHz (a total of 5 frequency points), and the 9 frequency points for transmitting wake-up signals cover all of the wake-up receiver 5 working frequency points.

Exemplarily, in the multi-frequency point transmission mode, the minimum frequency point at which the transmitter 100 transmits the wake-up signal is smaller than the minimum operating frequency point of the wake-up receiver 220, and the maximum frequency point at which the transmitter 100 transmits the wake-up signal is greater than the maximum frequency point of the wake-up receiver 220. working frequency. For example, the frequency points for transmitting wake-up signals are 2450.05MHz, 2450.15MHz, 2450.25MHz...2450.85MHz (9 frequency points in total), and the operating frequency points of wake-up receiver 220 are 2450.25MHz, 2450.45MHz, 2450.65MHz (3 frequency points in total). Frequency).

In an example, the frequency range corresponding to the bandwidth for transmitting the wake-up signal can cover all operating frequency points of the wake-up receiver 220, and the minimum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is smaller than the minimum frequency corresponding to the minimum operating frequency point of the wake-up receiver 220. The minimum frequency of the receiving frequency range, the maximum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is greater than the maximum frequency of the receiving frequency range corresponding to the maximum operating frequency point of the wake-up receiver 220 .

In the above example, the frequency at which the transmitter 100 transmits the wake-up signal covers all the operating frequencies of the wake-up receiver 220, and the probability of the wake-up receiver 220 capturing the wake-up signal is greatly increased, which can reduce the wake-up delay and improve user experience.

In another example, the number of frequency points for transmitting the wake-up signal by the transmitter 100 may also be less than or equal to the number of operating frequency points for waking up the receiver 220 . At this time, the operating frequency of the wake-up receiver 220 may cover part or all of the frequency points at which the transmitter 100 transmits the wake-up signal.

The second mode of transmitting the wake-up signal is a large-bandwidth transmission mode, that is, the wake-up signal is transmitted with a bandwidth greater than the required bandwidth of the wake-up signal.

FIG. 17 is a schematic diagram of a transmission signal of a transmitter and a reception signal of a wake-up receiver in a large-bandwidth transmission mode. Referring to FIG. 17 , in the large-bandwidth transmission mode, the transmitter 100 can transmit the wake-up signal through a bandwidth larger than the required bandwidth of the wake-up signal (assumed to be 100 KHz), for example, 1 MHz. The wake-up receiver 220 receives the wake-up signal in the extremely narrow-band range through the extremely narrow-band band-pass filter 222a in the multi-channel parallel signal processing circuit of different operating frequencies, as long as the operating frequency of any extremely narrow-band band-pass filter 222a is within Within the bandwidth (1 MHz) of the wake-up signal transmitted by the transmitter 100 , the wake-up receiver 220 will successfully receive the wake-up signal with a bandwidth of 100 KHz, thereby successfully waking up the main transceiver 240 .

For example, assuming that the bandwidth of the wake-up signal transmitted by the transmitter 100 is 1MHz (for example, the corresponding frequency range is 2450MHz to 2451MHz), the wake-up receiver 220 includes 2 parallel signal processing circuits, and the receiving bandwidth of the wake-up receiver 220 is 100KHz , the working frequency of the first signal processing circuit is 2450.05MHz (the corresponding receiving frequency range is 2450MHz to 2450.1MHz), the working frequency of the second signal processing circuit is 2450.25MHz (the corresponding receiving frequency range is 2450.2MHz to 2450.3MHz). If the operating frequency of the two signal processing circuits has temperature drift, for example, the actual operating frequency of the first signal processing circuit after temperature drift is 2449.95MHz (the corresponding actual receiving frequency range is 2449.9MHz to 2450MHz) , the actual operating frequency of the second signal processing circuit after temperature drift is 2450.65MHz (the corresponding actual receiving frequency range is 2450.6MHz to 2450.7MHz), then the second signal processing circuit can still operate at 2450MHz to 2450.7MHz after temperature drift A wake-up signal is received within the frequency range of 2451MHz. However, if the frequency range of the wake-up signal transmitted by the transmitter 100 is 2450 MHz to 2450.1 MHz, neither the first signal processing circuit nor the second signal processing circuit can receive the wake-up signal after temperature drift.

It can be seen that by increasing the transmission bandwidth, the large bandwidth transmission method increases the probability that the receiving frequency range corresponding to the actual working frequency point of the signal processing circuit after temperature drift is covered by the transmission bandwidth, thereby increasing the probability of successfully receiving the wake-up signal, which can Effectively combat the effects of temperature drift.

Fig. 18 is a schematic diagram schematically illustrating the principle of combating temperature drift in a wide-bandwidth transmission mode. Please refer to Figure 18, assuming that the operating frequency of the wake-up receiver is set as frequency 3 during design, but in actual operation, the operating frequency of the wake-up receiver is changed to frequency 4 due to the influence of temperature drift. In this way, even if the temperature drift occurs, since the transmitting bandwidth of the transmitter completely covers the wake-up signal ranges of frequency points 3 and 4, the receiver can still be woken up at the actual operating frequency point (frequency point 4) after the temperature drift occurs. ) receives a wake-up signal, so that the main receiver can be successfully woken up in the presence of temperature drift.

In an example, the frequency range corresponding to the bandwidth for transmitting the wake-up signal may cover all receiving frequency ranges corresponding to all operating frequency points of the wake-up receiver 220, and the minimum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is smaller than that of the wake-up receiver 220 The minimum frequency of the receiving frequency range corresponding to the minimum operating frequency point of , and the maximum frequency of the frequency range corresponding to the bandwidth for transmitting the wake-up signal is greater than the maximum frequency of the receiving frequency range corresponding to the maximum operating frequency point of the wake-up receiver 220 .

FIG. 19 is a schematic diagram showing bandwidth comparisons between the transmission signal of the transmitter and the reception signal of the wake-up receiver in the large-bandwidth transmission mode and the transmission signal of the transmitter and the reception signal of the wake-up receiver in the traditional solution. Please refer to Figure 19. The bandwidth of the signal transmitted by the transmitter in the large-bandwidth transmission mode is the same as that in the traditional solution, but the bandwidth of the signal received by the receiver in the large-bandwidth transmission mode is much smaller than that of the receiver in the traditional solution. Signal bandwidth. In this way, compared with the traditional solution, the wake-up receiver in the large-bandwidth transmission mode of the embodiment of the present application can filter out more noise and interference, has a higher signal-to-interference ratio, and improves the anti-interference capability.

In the embodiment of the present application, the transmitter 100 and the wake-up receiver 220 respectively store the physical frame structure information of the wake-up signal. In this way, the transmitter 100 determines the physical frame of the wake-up signal to be transmitted according to the stored physical frame structure information, and the wake-up receiver 220 identifies whether the filtered signal filtered by each signal processing circuit is a wake-up signal according to the stored physical frame structure information.

In one example, the wake-up signal can adopt a custom physical frame structure. FIG. 20 is a schematic diagram of a physical frame structure of a wake-up signal. Referring to FIG. 20, the wake-up signal physical frame may include a header and a Media Access Control Address (Media Access Control Address, MAC) protocol data unit. Wherein, the wake-up signal physical frame header carries the wake-up receiver synchronization signal sequence, and the MAC protocol data unit carries the wake-up receiver device ID. The physical frame structure information of the wake-up signal stored in the transmitter 100 and the wake-up receiver 220 includes the content of the wake-up receiver synchronization signal sequence. The wake-up receiver 220 stores its own wake-up receiver device ID, and each wake-up receiver device ID corresponds to the main transceiver 240 . In this way, the wake-up receiver 220 can identify whether the received signal is a wake-up signal according to the wake-up receiver synchronization signal sequence, and identify whether the main transceiver 240 in the second electronic device where the wake-up receiver 220 is located is a wake-up object according to the wake-up receiver device ID.

For example, assume that the header defining the physical frame of the wake-up signal includes x bits, the MAC protocol data unit m includes y bits, and x and y are natural numbers. The wake-up receiver 220 extracts the first x bits of data from the physical frame corresponding to the received signal, compares the x-bit data with the wake-up receiver synchronization signal sequence stored in itself, and if the two match, the received signal is determined to be a wake-up signal . The wake-up receiver 220 extracts the last y-bit data from the physical frame corresponding to the received signal, and compares the y-bit data with the wake-up receiver device ID stored in itself. The main transceiver 240 in the second electronic device is a wake-up object.

Here, matching may refer to: the correlation index value of the compared data of both parties is greater than or equal to a preset correlation threshold. Wherein, the correlation index value of the compared data of both parties can be obtained by using the correlation calculation method in the related art, and the embodiment of the present application does not limit the calculation method of the correlation index value, which will not be repeated here.

In another example, the wake-up signal may adopt a physical frame structure conforming to the 802.11 communication protocol. FIG. 21 is another physical frame structure diagram of a wake-up signal exemplarily shown. Please refer to Figure 21, the wake-up signal physical frame is a wake-up signal physical frame that complies with the WiFi protocol, and the wake-up signal physical frame still includes a header and a MAC protocol data unit, but it is different from the wake-up signal physical frame structure shown in Figure 20 , the header of the wake-up signal physical frame in FIG. 21 carries the WiFi preamble and the wake-up receiver synchronization signal sequence. Exemplarily, the WiFi preamble may include a short training sequence (Legacy Short Training Field, L-STF), a long training sequence (Legacy Long Training Field, L-LTF), a signaling sequence (Legacy Signal Field, L-SIG) and Binary Phase Shift Keying Mark (Binary Phase Shift Keying Mark, BPSK-Mark). The MAC protocol data unit of the wake-up signal physical frame in FIG. 21 carries the wake-up receiver device ID. The physical frame structure information of the wake-up signal stored in the transmitter 100 and the wake-up receiver 220 includes the content of the WiFi preamble and the synchronization signal sequence of the wake-up receiver. The wake-up receiver 220 stores its own wake-up receiver device ID, and each wake-up receiver device ID corresponds to the main transceiver 240 . In this way, the wake-up receiver 220 can identify whether the received signal is a wake-up signal according to the WiFi preamble and the wake-up receiver synchronization signal sequence, and identify whether the main transceiver 240 in the second electronic device where the wake-up receiver 220 is located is for the wakeup object.

For example, suppose that the header of the physical frame defining the wake-up signal includes a z-bit WiFi preamble and an x-bit wake-up receiver synchronization signal sequence, the MAC protocol data unit m includes y bits, and x, y, and z are natural numbers. Wake up the receiver 220 to extract the first z+x bit data from the physical frame corresponding to the received signal, compare the first z bit data in the z+x bit data with the WiFi preamble stored in itself, and obtain the first matching result, Comparing the last x bit data in the z+x bit data with the wake-up receiver synchronization signal sequence stored in itself to obtain a second matching result, if both the first matching result and the second matching result indicate a match, then it is determined to receive The signal is a wake-up signal. The wake-up receiver 220 extracts the last y-bit data from the physical frame corresponding to the received signal, and compares the y-bit data with the wake-up receiver device ID stored in itself. The main transceiver 240 in the second electronic device is a wake-up object.

It should be noted that the physical frame structure of the wake-up signal shown in FIG. 21 is only a schematic example. In other embodiments of the present application, the physical frame structure of the wake-up signal that conforms to other communication protocols, such as the Bluetooth protocol and the D2D protocol, can also be used. , the embodiment of the present application does not limit the physical frame structure of the wake-up signal.

It should be noted that, in an example, the wake-up receiver device ID in the wake-up signal transmitted by the transmitter 100 may correspond to a second electronic device, and at this time the wake-up signal is used to wake up a second electronic device. In another example, the wake-up receiver device ID in the wake-up signal transmitted by the transmitter 100 may also correspond to a group of second electronic devices (all the second electronic devices in the same group correspond to the same wake-up receiver device ID), where The timed wake-up signal is used to wake up a group of second electronic devices.

Here, an example is used to further describe the wake-up method in the embodiment of the present application in detail.

In the embodiment of the present application, the first electronic device is a WiFi router, and the WiFi router includes the transmitter 100 shown in FIG. 4 . The second electronic device is a mobile phone. The mobile phone includes the receiver 200 shown in FIG. 4 , and the main transceiver 240 is a WiFi module in the mobile phone. During the standby process of the mobile phone, the WiFi module in the mobile phone is in a dormant state, and the wake-up receiver in the mobile phone is in a working state.

The process of waking up the WiFi module in the mobile phone by the WiFi router may include the following steps:

The WiFi router receives the information A that needs to be forwarded to the application a on the mobile phone, and triggers the wake-up process;

The WiFi router takes T as the period, and in each period T, transmits wake-up signals on s frequency points in time division, s is a natural number, the wake-up signal includes wake-up sequence 1, and wake-up sequence 1 includes device ID1;

After the receiving antenna of the mobile phone receives the wake-up signal, the wake-up signal is output to each signal processing circuit 222 as an input signal; the extremely narrow band-pass filter 222a in each signal processing circuit 222 processes the input signal according to its own operating frequency. Filter to obtain the filtered signal;

In each signal processing circuit 222, the envelope detector 222b extracts the amplitude envelope of the filtered signal output by the extremely narrowband bandpass filter in this signal processing circuit to obtain the baseband pulse signal; then, the baseband pulse signal is respectively output to n-way comparator 222c and correlator 222d;

In each comparator 222c and correlator 222d, the comparator 222c compares the voltage of the baseband pulse signal output by the envelope detector 222b with its own reference voltage to obtain a 0/1 level sequence, and the 0/1 level sequence output to the correlator; the correlator 222d compares the 0/1 level sequence output by the comparator 222c with the wake-up sequence 2 stored locally in the mobile phone, and if the correlation between the 0/1 level sequence and the wake-up sequence 2 is greater than the preset Correlator 222d outputs a signal indicating that a wake-up signal has been received, such as a digital signal 1, otherwise the output indicates that a wake-up signal has not been received, such as a digital signal 0;

The logical OR operation circuit 222e located in each signal processing circuit 222 performs a logical OR operation on the output results of all correlators 222d in the signal processing circuit 222 of the road to obtain the output signal (0 or 1) of the signal processing circuit 222 of the road ;

Logical OR operation circuit 223 carries out logical OR operation to the output signals of all signal processing circuits 222 to obtain

output signal

0 or 1, if output signal 0, then output the signal indicating that the wake-up signal has not been received to wake-up signal generator 224, wake-up signal Generator 224 keeps original state; If output signal 1, then output and indicate that the signal of receiving wake-up signal is given to wake-up signal generator 224, and wake-up signal generator 224 generates the signal of indicating to wake up the WiFi module in the mobile phone to controller 230, and controller 230 controls the WiFi module in the mobile phone to enter the working state through the control command, and controls the wake-up receiver to enter the dormant state, and notifies the WiFi router that the WiFi module has been awakened;

The WiFi router sends the information A to the mobile phone, and the WiFi module on the mobile phone receives the information A, and sends the information A to the application a on the mobile phone;

If thereafter, the WiFi router does not send any communication data to the WiFi module on the mobile phone, then the WiFi module on the mobile phone waits for a preset period of time and then automatically enters the dormant state, and notifies the controller 230 on the mobile phone, and the controller 230 is controlled by a control command. Wake up the receiver 220 to enter the working state until the wake-up signal is received again, and execute the process of waking up the WiFi module on the mobile phone next time.

It should be noted that the wake-up sequence 2 stored in the mobile phone includes the device ID2 of the mobile phone. If the wake-up object of the WiFi router is a mobile phone, the device ID1 in the wake-up sequence 1 included in the wake-up signal transmitted by the WiFi router is exactly the same as the device ID2 in the wake-up sequence 2 . If the wake-up receiver 220 in the mobile phone accurately receives the wake-up signal transmitted by the WiFi router, the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone should be completely consistent with the device ID1 in the wake-up sequence 1. However, due to the matching accuracy relationship between the reference voltage in the comparator 222c and the distance between the WiFi router and the mobile phone, the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone and the device ID1 in the wake-up sequence 1 may not be completely Therefore, the device ID in the 0/1 level sequence output by the comparator 222c in the mobile phone may not be completely consistent with the device ID2 in the wake-up sequence 2, as long as the device in the 0/1 level sequence output by the comparator 222c in the mobile phone If the correlation index value between the ID and the device ID2 in the wake-up sequence 2 is greater than the preset correlation threshold, it is considered that the wake-up signal transmitted by the WiFi router is sent for the mobile phone.

It can be understood that, in order to realize the above functions, the electronic device includes hardware and/or software modules corresponding to each function. Combining the algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions in combination with the embodiments for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In an example, FIG. 22 is a schematic block diagram of an apparatus 900 according to an embodiment of the present application. The device 900 may include: a processor 901 , a transceiver/transceiving pin 902 , and optionally a memory 903 .

Various components of the device 900 are coupled together through a bus 904, wherein the bus 904 includes a power bus, a control bus, and a status signal bus in addition to a data bus. However, for clarity of illustration, the various buses are referred to as bus 904 in the figure.

Optionally, the memory 903 may be used for the instructions in the foregoing method embodiments. The processor 901 can be used to execute instructions in the memory 903, and control the receiving pin to receive signals, and control the sending pin to send signals.

The apparatus 900 may be the electronic device or the chip of the electronic device in the foregoing method embodiments.

Wherein, all relevant content of each step involved in the above-mentioned method embodiment can be referred to the function description of the corresponding function module, and will not be repeated here.

Wherein, the electronic device, computer storage medium, computer program product or chip provided in this embodiment is all used to execute the corresponding method provided above, therefore, the beneficial effects it can achieve can refer to the corresponding method provided above The beneficial effects in the method will not be repeated here.

Through the description of the above embodiments, those skilled in the art can understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be assigned by different Completion of functional modules means that the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or It may be integrated into another device, or some features may be omitted, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

A unit described as a separate component may or may not be physically separated, and a component shown as a unit may be one physical unit or multiple physical units, which may be located in one place or distributed to multiple different places. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

Any content of each embodiment of the present application, as well as any content of the same embodiment, can be freely combined. Any combination of the above contents is within the scope of the present application.

If an integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the software product is stored in a storage medium Among them, several instructions are included to make a device (which may be a single-chip microcomputer, a chip, etc.) or a processor (processor) execute all or part of the steps of the methods in various embodiments of the present application. The aforementioned storage medium includes: various media that can store program codes such as U disk, mobile hard disk, read only memory (ROM), random access memory (random access memory, RAM), magnetic disk or optical disk.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

A wake-up method is characterized in that, comprising:

The first signal processing circuit monitors on the first frequency point;

The second signal processing circuit monitors at a second frequency point; the second frequency point is different from the first frequency point;

The second signal processing circuit receives a wake-up signal at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is transmitted by the first electronic device at multiple transmission frequency points or transmitted over a bandwidth greater than a second value; the second value being greater than the first value;

The first signal processing circuit monitors on the second frequency point;

The second signal processing circuit monitors at a third frequency point; the third frequency point is different from the first frequency point and the second frequency point;

The first signal processing circuit receives the wake-up signal at the second frequency point.
The method according to claim 1, characterized in that,

The first signal processing circuit outputs a first logic value, and the first logic value is used to indicate that the first signal processing circuit receives a wake-up signal;

The second signal processing circuit outputs a second logic value, and the second logic value is used to indicate that the second signal processing circuit has not received a wake-up signal;

The first logic OR operation circuit determines that a wake-up signal is received according to the first logic value and the second logic value.
The method according to claim 1, wherein the first signal processing circuit comprises an extremely narrowband bandpass filter, an envelope detector, a comparator and a correlator, and the input terminal of the extremely narrowband bandpass filter Coupled with the antenna, the input end of the envelope detector is coupled with the output end of the extremely narrowband bandpass filter, the input end of the comparator is coupled with the output end of the envelope detector, and the correlator an input terminal coupled to an output terminal of the comparator;

The first signal processing circuit receiving the wake-up signal at the second frequency point includes:

The extremely narrowband bandpass filter performs extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain a filtered signal with an extremely narrow bandwidth;

The envelope detector extracts the amplitude envelope of the filtered signal to obtain a baseband pulse signal;

The comparator compares the voltage of the baseband pulse signal with a reference voltage to obtain a first digital signal sequence;

The correlator acquires a first correlation index value between the first digital signal sequence and a preset wake-up sequence, and compares the first correlation index value with a preset correlation threshold to obtain a correlation comparison As a result, when the correlation comparison result indicates that the first correlation index value is greater than the correlation threshold, the first signal is a wake-up signal.
The method according to claim 3, wherein the comparator comprises a first comparator and a second comparator, the input terminals of the first comparator and the input terminals of the second comparator are respectively connected to the The output end of the envelope detector is coupled; the correlator includes a first correlator and a second correlator, the input end of the first correlator is coupled with the output end of the first comparator, and the second correlator The input terminal of the correlator is coupled with the output terminal of the second comparator; the first signal processing circuit also includes a second logical OR operation circuit, the output terminal of the first correlator and the output terminal of the second correlator The output terminals are respectively coupled to the input terminals of the second logical OR operation circuit;

The comparator compares the voltage of the baseband pulse signal with a reference voltage to obtain a first digital signal sequence, including:

The first comparator compares the voltage of the baseband pulse signal with a first reference voltage to obtain a first candidate digital signal sequence;

The second comparator compares the voltage of the baseband pulse signal with a second reference voltage to obtain a second candidate digital signal sequence; the second reference voltage is different from the first reference voltage;

The correlator acquires a first correlation index value between the first digital signal sequence and a preset wake-up sequence, and compares the first correlation index value with a preset correlation threshold to obtain a correlation comparison As a result, when the correlation comparison result indicates that the first correlation index value is greater than the correlation threshold, the first signal is a wake-up signal, including:

The first correlator acquires a first candidate value of a first correlation index value between the first candidate digital signal sequence and a preset wake-up sequence, and converts the first candidate value of the first correlation index value to The selected value is compared with a preset correlation threshold to obtain a first correlation comparison result;

The second correlator obtains a second candidate value of a first correlation index value between the second candidate digital signal sequence and a preset wake-up sequence, and converts the second candidate value of the first correlation index value to Comparing the selected value with a preset correlation threshold to obtain a second correlation comparison result;

The second logic OR operation circuit performs a logic OR operation on the first correlation comparison result and the second correlation comparison result to obtain a first logic OR operation result; when the first logic OR operation result indicates the At least one of the first candidate value of the first correlation index value and the second candidate value of the first correlation index value is greater than a preset correlation threshold, and the first signal processing circuit is in the The wake-up signal is received at the second frequency point.
The method according to claim 1, wherein the first signal processing circuit comprises an ultra-narrowband bandpass filter, an envelope detector, a comparator including an integrating circuit, and a correlator, and the extremely narrowband bandpass The input end of the filter is coupled to the antenna, the input end of the envelope detector is coupled to the output end of the extremely narrowband bandpass filter, and the input end of the comparator comprising an integrating circuit is coupled to the envelope detector coupled to the output of the correlator, the input of the correlator is coupled to the output of the comparator comprising an integrating circuit;

The first signal processing circuit receiving the wake-up signal at the second frequency point includes:

The extremely narrowband bandpass filter performs extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain a filtered signal with an extremely narrow bandwidth;

The envelope detector extracts the amplitude envelope of the filtered signal to obtain a baseband pulse signal;

The comparator comprising an integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a reference voltage to obtain a second digital signal sequence;

The correlator obtains a second correlation index value of the second digital signal sequence and a preset wake-up sequence, and compares the second correlation index value with a preset correlation threshold to obtain a correlation comparison Result; when the correlation comparison result indicates that the second correlation index value is greater than a preset correlation threshold, the first signal is a wake-up signal.
The method according to claim 5, wherein the comparator comprising an integrating circuit comprises a third comparator and a fourth comparator, and both the third comparator and the fourth comparator comprise an integrating circuit , the input end of the third comparator and the input end of the fourth comparator are respectively coupled to the output end of the envelope detector; the correlator includes a third correlator and a fourth correlator, the The input terminal of the third correlator is coupled to the output terminal of the third comparator, and the input terminal of the fourth correlator is coupled to the output terminal of the fourth comparator; the first signal processing circuit also includes a first signal processing circuit. Two logic OR operation circuits, the output end of the third correlator and the output end of the fourth correlator are respectively coupled to the input end of the second logic OR operation circuit;

The comparator comprising an integrator circuit converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a reference voltage to obtain a second digital signal sequence, including:

The third comparator converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a third reference voltage to obtain a third candidate digital signal sequence;

The fourth comparator converts the baseband pulse signal into a single pulse signal, and compares the voltage of the single pulse signal with a fourth reference voltage to obtain a fourth candidate digital signal sequence; the fourth reference voltage and the the third reference voltages are different;

The correlator obtains a second correlation index value of the second digital signal sequence and a preset wake-up sequence, and compares the second correlation index value with a preset correlation threshold to obtain a correlation comparison Result; when the correlation comparison result indicates that the second correlation index value is greater than a preset correlation threshold, the first signal is a wake-up signal, including:

The third correlator obtains the first candidate value of the second correlation index value of the third candidate digital signal sequence and the preset wake-up sequence, and converts the first candidate value of the second correlation index value to The selected value is compared with a preset correlation threshold to obtain a third correlation comparison result;

The fourth correlator acquires a second candidate value of a second correlation index value between the fourth candidate digital signal sequence and a preset wake-up sequence, and converts the second candidate value of the second correlation index value to Comparing the selected value with a preset correlation threshold to obtain a fourth correlation comparison result;

The second logic OR operation circuit performs a logic OR operation on the third correlation comparison result and the fourth correlation comparison result to obtain a second logic OR operation result; when the second logic OR operation result indicates the At least one of the first candidate value of the second correlation index value and the second candidate value of the second correlation index value is greater than a preset correlation threshold, and the first signal is a wake-up signal.
The method according to claim 1, wherein the first frequency point and the second frequency point are adjacent frequency points.
The method according to claim 1, wherein the first frequency point and the second frequency point are non-adjacent frequency points.
The method according to claim 1, wherein the multiple transmitting frequency points include at least one of the first frequency point and the second frequency point.
The method according to claim 1, wherein at least one frequency point of the first frequency point and the second frequency point is within a bandwidth in which the first electronic device transmits the wake-up signal.
A wake-up device is characterized in that it comprises:

a first signal processing circuit, the first signal processing circuit is coupled to the antenna, and is used for monitoring on a first frequency point;

A second signal processing circuit, the second signal processing circuit is coupled to the antenna, and is used for monitoring at a second frequency point; the second frequency point is different from the first frequency point;

The second signal processing circuit is further configured to receive a wake-up signal at the second frequency point; the bandwidth of the wake-up signal is smaller than the first value; the wake-up signal is the first electronic device at multiple transmission frequency points transmitted or transmitted over a bandwidth greater than a second value; said second value being greater than said first value;

The first signal processing circuit is also used for monitoring on the second frequency point;

The second signal processing circuit is also used for monitoring at a third frequency point; the third frequency point is different from the first frequency point and the second frequency point;

The first signal processing circuit is further configured to receive the wake-up signal at the second frequency point.
The device according to claim 11, characterized in that,

The first signal processing circuit is further configured to output a first logic value, and the first logic value is used to indicate that the first signal processing circuit receives a wake-up signal;

The second signal processing circuit is further configured to output a second logic value, and the second logic value is used to indicate that the second signal processing circuit has not received a wake-up signal;

The device also includes:

A first logic or operation circuit, the input terminals of the first logic or operation circuit are respectively coupled to the output terminals of the first signal processing circuit and the output end of the second signal processing circuit, and the first logic or operation The circuit is used to determine that a wake-up signal is received according to the first logic value and the second logic value.
The device according to claim 11, wherein the first signal processing circuit comprises:

An extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used to perform extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain an extremely narrow bandwidth filter signal;

An envelope detector, the input end of the envelope detector is coupled to the output end of the ultra-narrowband bandpass filter, and is used to extract the amplitude envelope of the filtered signal to obtain a baseband pulse signal;

a comparator, the input end of the comparator is coupled to the output end of the envelope detector, and is used to compare the voltage of the baseband pulse signal with a reference voltage to obtain a first digital signal sequence;

a correlator, the input terminal of the correlator is coupled to the output terminal of the comparator, and is used to obtain a first correlation index value between the first digital signal sequence and a preset wake-up sequence, and convert the first Comparing the correlation index value with a preset correlation threshold value to obtain a correlation comparison result, when the correlation comparison result indicates that the first correlation index value is greater than the correlation threshold value, the first signal is wake-up Signal.
The device according to claim 13, wherein the comparator comprises:

A first comparator, the input terminal of the first comparator is coupled to the output terminal of the envelope detector, and is used to compare the voltage of the baseband pulse signal with the first reference voltage to obtain the first alternative digital signal sequence;

A second comparator, the input terminal of the second comparator is coupled to the output terminal of the envelope detector, and is used to compare the voltage of the baseband pulse signal with a second reference voltage to obtain a second alternative digital a signal sequence; the second reference voltage is different from the first reference voltage;

The correlators include:

A first correlator, the input terminal of the first correlator is coupled to the output terminal of the first comparator, and is used to obtain a first correlation index between the first candidate digital signal sequence and a preset wake-up sequence value, and comparing the first candidate value of the first correlation index value with a preset correlation threshold to obtain a first correlation comparison result;

A second correlator, the input end of the second correlator is coupled to the output end of the second comparator, and is used to obtain a first correlation index between the second candidate digital signal sequence and a preset wake-up sequence value, and comparing the second alternative value of the first correlation index value with a preset correlation threshold to obtain a second correlation comparison result;

The device also includes a second logic-or operation circuit, the input terminals of the second logic-or operation circuit are respectively coupled to the output terminals of the first correlator and the output terminal of the second correlator, and are used for performing a logical OR operation on the first correlation comparison result and the second correlation comparison result to obtain a first logical OR operation result; when the first logical OR operation result indicates the first correlation index value of the first correlation index value At least one of the candidate value and the second candidate value of the first correlation index value is greater than a preset correlation threshold, and the first signal is a wake-up signal.
The device according to claim 11, wherein the first signal processing circuit comprises:

An extremely narrowband bandpass filter, the input end of the extremely narrowband bandpass filter is coupled to the antenna, and is used to perform extremely narrowband bandpass filtering on the first signal monitored at the second frequency point to obtain an extremely narrow bandwidth filter signal;

an envelope detector, the input end of the envelope detector is coupled to the output end of the ultra-narrowband bandpass filter, and is used to detect the amplitude envelope of the filtered signal to obtain a baseband pulse signal;

a comparator including an integrator circuit, the input of the comparator including the integrator circuit is coupled to the output of the envelope detector for converting the baseband pulse signal into a single pulse signal, and converting the comparing the voltage of the single pulse signal with the reference voltage to obtain a second digital signal sequence;

a correlator, the input end of the correlator is coupled to the output end of the comparator including an integrator circuit, and is used to obtain a second correlation index value between the second digital signal sequence and a preset wake-up sequence, and Comparing the second correlation index value with a preset correlation threshold to obtain a correlation comparison result; when the correlation comparison result indicates that the second correlation index value is greater than the preset correlation threshold, the The first signal is a wake-up signal.
The apparatus according to claim 15, wherein the comparator comprising an integrating circuit comprises:

A third comparator, the third comparator includes an integrating circuit, the input terminal of the third comparator is coupled to the output terminal of the envelope detector, and is used to convert the baseband pulse signal into a single pulse signal , and comparing the voltage of the single pulse signal with the third reference voltage to obtain a third candidate digital signal sequence;

A fourth comparator, the fourth comparator includes an integrating circuit, the input terminal of the fourth comparator is coupled to the output terminal of the envelope detector, and is used to convert the baseband pulse signal into a single pulse signal , and comparing the voltage of the single pulse signal with a fourth reference voltage to obtain a fourth candidate digital signal sequence; the fourth reference voltage is different from the third reference voltage;

The correlators include:

A third correlator, the input terminal of the third correlator is coupled to the output terminal of the third comparator, and is used to obtain a second correlation index between the third candidate digital signal sequence and a preset wake-up sequence value, and comparing the first alternative value of the second correlation index value with a preset correlation threshold to obtain a third correlation comparison result;

A fourth correlator, the input terminal of the fourth correlator is coupled to the output terminal of the fourth comparator, and is used to obtain a second correlation index between the fourth candidate digital signal sequence and the preset wake-up sequence value, and comparing the second alternative value of the second correlation index value with a preset correlation threshold to obtain a fourth correlation comparison result;

The device also includes a second logic-or operation circuit, the input terminals of the second logic-or operation circuit are respectively coupled to the output terminals of the third correlator and the output terminal of the fourth correlator, and are used for Perform a logical OR operation on the third correlation comparison result and the fourth correlation comparison result to obtain a second logical OR operation result; when the second logical OR operation result indicates the first value of the second correlation index value At least one of the candidate value and the second candidate value of the second correlation index value is greater than a preset correlation threshold, and the first signal is a wake-up signal.
The device according to claim 11, wherein the first frequency point and the second frequency point are adjacent frequency points.
The device according to claim 11, wherein the first frequency point and the second frequency point are non-adjacent frequency points.
The device according to claim 11, wherein the multiple transmitting frequency points include at least one of the first frequency point and the second frequency point.
The apparatus according to claim 11, wherein at least one of the first frequency point and the second frequency point is within a bandwidth within which the first electronic device transmits the wake-up signal.
An electronic device, characterized in that it comprises:

a memory and a processor, the memory being coupled to the processor;

The memory stores program instructions, and when the program instructions are executed by the processor, the electronic device is made to execute the wake-up method described in any one of claims 1-10.
A computer-readable storage medium is characterized by comprising a computer program, and when the computer program is run on an electronic device, the electronic device is made to execute the wake-up method according to any one of claims 1-10.